Scaphognathite \Sca*phog"na*thite\, n. [Gr. ska`fh boat +
gna`qos jaw.] (Zool.)
A thin leafike appendage (the exopodite) of the second
maxilla of decapod crustaceans. It serves as a pumping organ
to draw the water through the gill cavity.
[1913 Webster]